语法与词汇
_____ for your help, we’ d never have been able to get over the difficulties.无
A、
Had it not been
B、
If it were not
C、
Had it not
D、
if we had not been
【正确答案】
A
【答案解析】
这句话是if引导的虚拟条件句， 与过去事实相反， 从句是If＋ 主语＋ had＋ 过去分词， 主语＋ would/could/might＋ have＋ 过去分词。 if可以省略， 将had提前。
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